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Table 2 Residential Prenatal Exposures to Ambient Air Pollutants

From: Prenatal exposure to ambient air pollutants and early infant growth and adiposity in the Southern California Mother’s Milk Study

Pollutant Mean ± SD PM2.5 (μg/m3) PM10 (μg/m3) NO2 (ppb) O3 (ppb) Oxwt
PM2.5 (μg/m3) 11.95 ± 1.15 1     
PM10 (μg/m3) 31.03 ± 3.54 0.75*** 1    
NO2 (ppb) 18.05 ± 2.34 0.47*** 0.27** 1   
O3 (ppb) 26.02 ± 2.38 -0.17 0.18* -0.80*** 1  
Oxwt 23.30 ± 1.04 0.12 0.51*** -0.45*** 0.88*** 1
  1. Mean and standard deviations of exposure levels and Spearman’s rank correlation between residential ambient air pollutants during the prenatal period. Correlation coefficients (ρ) and p-values are shown for each pair of exposures. ***p < 0.001, **p < 0.01, *p < 0.05. PM2.5 and PM10 were measured in micrograms per cubic meter and NO2 and O3 were measured in parts per billion. Oxwt was calculated by the weighted redox potential of NO2 and O3, as follows: ([1.07*NO2 + 2.075*O3]/3.145)